Digital joystick control

• US 4,161,726 A
• Filed: 04/06/1977
• Issued: 07/17/1979
• Est. Priority Date: 04/06/1977
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Burson, David C., Larson, Harold D.
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): Groody, James J.
• Application Number:
  US05/785,144
• Time in Patent Office: 832 Days
• Field of Search: 340/365 R, 340/365 S, 340/204, 340/347 P, 340/365 P, 200/1 R, 200/6 R, 200/6 A, 74/471 XY, 338/128
• US Class Current: 341/9
• CPC Class Codes: G05G 9/047 the controlling member being movable by hand about orthogonal axes, e.g. joysticks for switches H01H25/04
• CPC Class Codes: G06F 3/0383 Signal control means within the pointing device
• CPC Class Codes: G09G 5/024 using colour registers, e.g. to control background, foreground, surface filling G09G5/06 takes precedence
• CPC Class Codes: Y10T 74/20201 Control moves in two planes

Abstract

A digital joystick control includes an elongated shaft member having a spherical ball at one end thereof. First and second socket members are coupled to the joystick to provide a swivel joint between the ball and the socket members enabling movement of the shaft about the ball in any direction; movement of the joystick effects corresponding movement of the socket members. Each of the socket members is connected to a plate member which moves therewith. The plate members have a patterned surface presenting conductive and non-conductive regions in opposing relation to wiper arms which engage the patterned surfaces. The patterned surfaces are coded in such a manner that the locations of the conductive and non-conductive regions of the patterned surfaces with respect to the wiper arms are changeable in response to movement of the shaft of the joystick whereby a unique digital-coded positional signal is generated for preselected incremental positions of the shaft.

Claims

1. A digital joystick control comprising:

(a) an elongated shaft member having a spherical ball at one end thereof;

(b) first and second socket members coupled to said elongated shaft member to provide a swivel joint between said ball and said socket members for enabling pivotal movement, of said shaft member about said ball in any direction, movement of said shaft member effecting corresponding pivotal movement of said socket members;

(c) first and second plate members respectively connected to said first and second socket members for pivotal movement therewith, said plate members having a patterned surface of conductive and non-conductive regions;

(d) a plurality of wiper arms in opposing relation to said conductive and non-conductive regions of said plate members for engaging said patterned surfaces, the locations of the conductive and non-conductive regions of the patterned surfaces with respect to the wiper arms being changeable in response to movement of said shaft member whereby a unique digital-coded positional signal is generated for each predetermined incremental position of said shaft member.

2. The digital joystick control according to claim 1, wherein:

(a) said first socket member comprises a cup-shaped member in which said ball is seated, said cup-shaped member having an elongated slot; and

wherein

(b) said second socket member comprises an arcuate strap extending about said cup-shaped member in traverse relationship thereto, said arcuate strap having an elongated groove disposed substantially perpendicular to the slot in said cup-shaped member; and

wherein

(c) said ball includes a pin member extending through the slot in said first socket member and into the groove in said second socket member thereby interconnecting said first and second socket members with said shaft member to provide said swivel joint between said ball and said socket members enabling movement of said shaft about said ball.

3. The digital joystick control according to claim 1 including a circuit board having a plurality of said conductive wiper arms mounted thereon, extending outwardly thereof.

4. The digital joystick control according to claim 1, wherein said first and second plates are arcuate in shape and fixably connected to said first and second socket members, respectively, for movement therewith.

5. A digital joystick control comprising:

(a) a platform having a centrally-located circular opening provided therein;

(b) a base member depending from said platform and having respective pairs of side and end support members defining a chamber in registration with the circular opening in said platform;

(c) a joystick including an elongated shaft having a spherical ball on one end thereof, the elongated shaft of said joystick being disposed outwardly of said platform with said spherical ball being partially received within said chamber, and protruding outwardly of the circular opening in said platform;

(d) first and second socket members mounted within said chamber, said first socket member comprising a cup-shaped member in which said ball is seated, said cup-shaped member having an elongated slot disposed substantially perpendicular to the side support members and being pivotably connected to said side support members for movement about an axis perpendicular thereto, said second socket member comprising an arcuate strap extending about said cup-shaped member in traverse relationship thereto, said arcuate strap having an elongated groove disposed substantially perpendicular to the end support members and being pivotably connected to said end support members for movement about an axis perpendicular thereto;

(e) said ball having a pin member extending through the slot in said first socket member and into the groove in said second socket member thereby interconnecting said first and second members with said joystick to provide a swivel joint between said ball and said first and second socket members to enable movement of said shaft about said ball in any direction with respect to said platform;

(f) first and second circuit boards mounted in fixed relation to said base member, each of said circuit boards including a plurality of conductive wiper arms extending outwardly thereof; and

(g) first and second plate members fixably connected to said first and second socket members, respectively, for pivotal movement therewith, each of said plate members having a patterned surface presenting conductive and non-conductive regions in opposing relation to said circuit board with said wiper arms engaging the patterned surfaces of said plate members, the locations of the conductive and non-conductive regions of the patterned surface of said plate members with respect to said wiper arms being changeable in response to movement of the shaft member of said joystick.

6. The digital joystick control according to claim 5, wherein said plate members are arcuate in shape, said first arcuate plate member being mounted exteriorally with respect to one of said side support members, and said second arcuate plate being mounted exteriorally with respect to one of said end support members.

7. The digital joystick control according to claim 5, wherein each of said plate members are arcuate in shape.